/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Try to open reparent menu for specified blueprint
static void OpenReparentBlueprintMenu ( [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * Blueprint, const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > & ParentContent, const FOnClassPicked & OnPicked )